GMC Sierra 1500 / 2021
2021 GMC Sierra 1500 problems
Owners have filed 741 complaints about the 2021 GMC Sierra 1500 with NHTSA. Engine accounts for 37.2% of them — the clear leader, ahead of power train at 17.8%.
Complaints741
Crashes7
Fires12
Injuries2
Deaths0
What owners report breaking
Engine 37.2% · 276
Power train 17.8% · 132
Electrical system 9.9% · 73
Engine and engine cooling 6.2% · 46
Unknown or other 5.4% · 40
Fuel/propulsion system 4.5% · 33
Steering 4.3% · 32
Service brakes 3.0% · 22
Severity
Of those complaints, 7 describe a crash, 12 describe a fire and 2 report an injury.
Reading the numbers
Across the 29 model years of the GMC Sierra 1500 in this data, 2021 sits 4th by complaint volume. 2014 draws the most.
Filings are rising — 598 in the last three years against 138 in the three before. For a vehicle this age that usually points to a wear-related failure owners are hitting now.
The median odometer reading at the time of complaint was 46,000 miles.
In owners' own words
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving in inclement weather, the vehicle stalled without warning. The contact looked under the vehicle and saw that engine oil was leaking from a puncture in the oil pan. The vehicle was towed to the local dealer however, the cause of the failure was not yet determined. The manufacturer was notified of the failure. The failure mileage was 5,800. Engine · reported at 5,800 miles
I had an engine warning warning light on my dash around May 5th. A notice of reduced speed also lit up my dash while I was on the freeway. I scheduled a service for May 15th and was told the engine coolant flow control valve needed to be replaced. I was also told there was a backlog of other vehicles waiting for the same part. It has been over a month and I am still unable to drive my truck which I use for work. Engine
My Truck has been consuming oil since new, latest documented consumption test was 1.25 quarts in 1967 miles. GM dealership said that is normal and no further diagnosis is required. GM says acceptable consumption is 1 quart per 2,000 miles. This truck has a 6.2L engine that is not under the current recall ( N252494000 ). The engine problems affect more vehicles that the current recall and should be investigated. Engine
Verbatim from NHTSA filings. Complaints are unverified owner reports.
Safety recalls
Checking NHTSA for open recalls…